Coercivity and Nano-structure in Magnetic Spinel Mg(Mn,Fe)$_{2}$O$_{4}$

ORAL

Abstract

We discovered that the micro-to-nano-structure of Mg(Mn,Fe)$_{2}$O$_{4}$ drastically changes with different thermal treatment. This extraordinary structural evolution is associated with spinodal chemical decomposition associate with the Jahn-Teller structural distortions around Mn ions. The magnetic properties of the polycrystalline Mg(Mn,Fe)$_{2}$O$_{4}$ vary with the structural progress. Particularly, the Curie temperature and magnetic coervcivity considerably change with the structural evolution. The significantly-enhanced coercivity in the system with elongated nanostuructre stems from the large shape anisotropy of the nanostructure.

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Authors

  • Chenglin Zhang

    • Physics Department, Rutgers University

  • S. Yeo

  • SangWook Cheong

    • Department of Physics \& Astronomy, Rutgers University, Piscataway, New Jersey 08854
    • Physics Department, Rutgers University
    • Rutgers University
    • Dept. of Physics and Astronomy, Rutgers University
    • Rutgers Center for Emergent Materials, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854
    • Department of Physics, Rutgers
    • Rutgers Univ.